Quantitative continuous measurement of pO2 and pCO2 in artery and vein

被引：0

作者：

Pinard, E. ^{[1
]}

Seylaz, J. ^{[1
]}

Mamo, H. ^{[1
]}

机构：

[1] Lab. Physiol. Pathol. Cerebro-Vasc., Hop. Lariboisiere, Paris, France

来源：

Medical and Biological Engineering and Computing | 1978年 / 16卷 / 01期

关键词：

BIOLOGICAL MATERIALS - Blood - CARBON DIOXIDE - Pressure Measurement - MASS SPECTROMETERS - Applications - OXYGEN - Pressure Measurement - POLYETHYLENES - Applications;

D O I：

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学科分类号：

摘要：

A technique using a quadrupole mass spectrometer has been developed for continuous measurement of partial pressures of physiological blood gases. The depletion phenomenon is eliminated with a new sampling cannula equipped with a polyethylene membrane for velocities greater than 1 cm per second. The importance of this development resides in the fact that this phenomenon, due to a sampling rate around the cannula in excess of the replacement by the medium of the molecules withdrawn, leads to an under-estimation of the real partial pressure which increases as the blood velocity falls. With the new cannula, accurate measurements can now be made in both arteries and veins; moreover, continuous observation of physiological phenomena can be carried out with a time constant of under 1 minute because of the thinness of the membrane.

引用

页码：59 / 64